4-4 Maintenance and Troubleshooting
5.
Gently push the ball out of the large opening in the side of the ball cover.
6.
Clean the mouse as follows:
n
Clean the mouse ball with tap water or tap water and a mild detergent.
n
Dry the mouse ball with a clean, lint-free cloth.
n
Blow into the mouse socket to remove any dust or lint.
7.
Gently put the ball back into the mouse ball cover.
8.
Fit the ball cover back into the mouse and turn the cover counterclockwise until it
locks in place.
TROUBLESHOOTING
This subsection provides information that helps isolate and repair system malfunctions at the
field level. Step-by-step instructions for diagnosing and solving system hardware problems
are provided.
If disassembly is required, see Section 5. Connector pin assignments are given in Appendix
A. Switch settings are given in Appendix B.
Error Messages
Messages may appear during the POST or at other times during computer operation. Table
Section 4-2 describes possible system error messages. Table Section 4-4 describes possible
PCI error messages.
Table Section 4-2 System Error Messages
Message
Description
Address Line Short
Error in the address decoding circuitry on the system board.
Cache Memory Failure, Do
Not
Enable Cache
Cache memory is defective. Replace the CPU.
CMOS Battery Failed
CMOS RAM battery power is low. Replace the battery (see
battery replacement at the end of this section).
CMOS Checksum Invalid
After CMOS RAM values are saved, a checksum value is
generated for error checking. The previous value is different
from the current value. Run Setup .
CMOS System Options Not
Set
The values stored in CMOS RAM are either corrupt or
nonexistent. Run Setup (see Section 2).
CMOS Time and Date Not Set
Run Setup to set the date and time (see Section 2).
